SG-1型土壤固化剂固化土的实验研究

Experimental Study on Soil Stabilized by SG-1 Soil Stabilizer

实验采用自制SG-1固化剂对江苏滨海区盐渍土进行固化实验,并与水泥固化土进行了对比实验。考察了固化剂掺量及试件养护龄期对固化土无侧限抗压强度的影响,并在此基础上进行了固化土耐水性试验。结果表明,该固化剂掺量为10%时,固化土试件的7d抗压强度可达4.1MPa,水稳系数为0.80,均优于水泥固化土。随着养护龄期增长和固化剂掺量增加,抗压强度不断增大。采用XRD和SEM对SG-1固化剂固化土试件进行了表征,结果表明,SG-1型固化土中生成的钙矾石晶体填充了空隙,使固化土强度及耐水性增强。

Stabilization of saline soil collected from Jiangsu coastal area was carried with self-made stabilizer SG-1, which compared with solidified soil stabilized by cement. The effect of dosage of the composite soil stabilizer and the curing age of the stabilized soil on unconfined compressive strength of solidified soil is analyzed. Meanwhile water resistance of the soil specimen stabilized by the composite soil stabilizer was also tested. Results showed that, the stabilized soil specimen with addition of 10~//00 composite soil stabilizer presented its 7 d compressive strength 4. 1 MPa and water resistance coefficient 0. 80 which are higher than soil stabilized by cement. The compressive strength increases with the increase of curing period and stabilizer content. The results from the scanning electron microscopy （SEM）, X-ray diffraetion tests show that when using the stabilizer SG-1 to stabilize the saline soil, ettringite crystals are generated which fill the interspace and contribute the increase of compressive strength and water resistance.